Ribbed gonoidal washer



I) \Vll) l)()'l)l'), 01" ORANGF, ASSTGNOR TO THE NA'lIONA'L LON( XYASllER (KDFPANY, O l? NEXYARK, NEXV JERSEY. i

SPECIFICATION ormng part of Letters Patenta Ne. 398352, ciatezl Earch 5, 1389.

Application filed May 25, 1888, Serial No. 275,041 (Ne nael.)

,lle it known that I, DAWD DODD, oi" Orange, New .lerseu hene inventel :Nermin linprm'einent in Rihhed onohlnl hshers, of whi' h the l'oliowing is :i speeiiention.

This improvement relntes to ;L lr'l\:-wsisler ol' the type in whieh u ril is provided upon the Side, whieh is intended l'or inpnet :igziinst the unt. in ortler that; when the nut in serewed honie the npex of the rilL hy embedding' it'- selt' into the 't'ziee ot' the nut, will (lisplnee and force a portion of the metal ot' the nut; eonrergent ly against the holt. There have l'een g heret'tnore known two kinda ot' such wnshers. 5 One is the mimipurnt iVely thin (hit wnrher provided with a` projeet'ing rit around it's inner edge, shown and described in Letters Patent of the l nited States No. 258,122, (hmeti May 2 3, 1882, and the other is; the s 'iralunsher, provided with u rih nrouml it's eonenve edge. shown and described in Letters Parent of the L'nitel fitntes No. 340.134& (luten April ?ti 18%. The lztter is neeeSsnrily nznle oli' a eonpzrntirely thiek lmr ot' steel and t'hus rej Sists compression with such energy thot: the rib begins ita; work ot displneing the inetnl ol." the nut soon after the nut ;requires eontnet with it, zunl i'on-tinues in the perfornizuee ot' its Work during tjhe pe iod while the nut: isa being turned the reqni ite nunher oi' rerolutimistxieti'eet thecompression ol' ;ill thepnrtn ot' the &pit-nl wnsher into the snut-e plane. Un the (-ontrnry, in the etn se ol' the thin larta washer cont'zet is not'` nnule with the :unix of V the rih unt il the nur has heen erewel neni-ly I home, and the result'` ir\ thnt the nut izuns upou the \\'21Sl10t' hefore the lesretl ext'eut of eonl Vergent displnreinent of the netzl of the nut i ha heen etteeel.

The olrieet ot' the present inrention is to I give to the eongnu'ntively thin rihled wnsher :Lu imrenswl enpneity ol' elii'eeting the progressiveonrergentdisplnemneut ot' the metal l ot' the nut'; and the invention consists ingiving' to the thin rihheil wnsher u eonohlnl or dishe& form se iihut when it's outer edge is hearing upon the surfnee ot' the olrieet through Whith the bolt in inserted the ril around its Inner edge will aequire eontnet with the l'nee ot' il1(111tt,;tltl will begin its work ot on\'ergen1 ly emnpressiug the metal of the 'a` Seetional View ol? a ho unt t( war(l the holt :u: an enrlier :t'ng'e in the operation of serewing the holl home, nnl will continue itswork (lui-ing the period while the unt hein' turned to the extent requiro l 'to i compress the nner port-lon ot' the wznhor into the muno plane ;na the enter portion,

The aeeonpnnfing tlrnwingr showing :t ribbed COltOltlll vw 'herenhmlying the invention :unt illustraiing;` it's operation when in use, are ;is follows:

Figure .l a top View ol' :2 rihhel eouoitlal 01' (lishetl wnsher. Pie'. is a t'rnnsverse seetion through the line ,n l. Ftg. 3 is 4 lt', nn object through whieh the holt is inserted, a nut npplied to the holt, and a rihheil eonoidnl Washer interpese& l.et1ween the nut nzl the object through which the holl; is nse' (l. Fig. 4: 'a sectionnl View similar to i* except that it shows the nut oerewetl home, and exhihits in nn exaggernted \\'tt the (llSj'lflCOnlOllh of the metal ot' the nut' enused h the iinpin enent upon it's 't'ime of the ril with Wllltll the Washer iS provided. l `igs. 5 and, l' ;tre transverse sections ol? a ri'ohetl wnsher, illustrzrtig slight nodilieztt-ions in the hape of' the (lishiug i thereof.

' m'i ring of eonparntively t hin fiat', steel, li't 'hletl with n projectine' V-shnped ril' (i, ;i round it'sinner edge upon the side which in' in =n leal ?or iinpnet against, the nu 'The (lis. gj: &hupe ot' the Washer will usunlly he givei to iti hy inean ot" suit'- ztlJLv-shtped puneh-s :unt lies-i.

The Washer shown in l. has, it will be t-li, the shane ol? ishe 'ruiat'un of n hollow vone, the nngles of the sitles ot whieh with it's hame ure extremely nente.

In the modification illun igiel in Fig. 5 the Washer, :s will he seem has; the shupe of the segment; of ;L Sphere. 'lu the modification illuslrzu'el, in Fi a'. "3 the trnnrwerse eurrztture ot' the shles is the reverse oi? that' shown in Fig. 3. The (lilerent ,t'ornis ot' Washer illustirzteil, in the drawing ;rre suhstnntinllyAlike The Washer A is ;a

in their node ot' ogeration, and are all intended. to he eonprehemled under the terms ('onoidnl Washer or (lished Washer.

In. 3 the wn her A repi'esented as interposed between the nut 'E and the surface of the ohjeet through whieh the. holt D is IOO tionot' the metal ot' the nut, and the central portion of the Washer has been compressed into the same plane as the outcr portion.

fhe Washer A is made of sutabiy-hardened steel, and hence bears with elastic pressure on one side against the face of the object through which the bolt is inserted and on the other side against the nut. Owing to the resistance which the conoidal washer opposes to compression, the rib a begins the performance of its function of displacing the metal of the nut and etteeting its convergent movement toward the bolt when the parts have acquired the position in which they are represented in Fig. 3, and such convergent movcmetrt continues to be progressively effected while the Washer is gradually yielding to the compression due to the serewing home of t-he nut, and until the parts acquire the relative positions in which they are represented in Fig. 4. e

It is to be understood that the dishing of the waslers may be either more or less than that represented in the drawings without dei i i i i parture from the invention. In practice the dished washcrs will be given a rather low spring temper, in order that they may yield to compression without breaking.

That is claimed as the invention is- 1. The new article of manufaeture herein shown and described, the same eonsisting of a conoidal or dished Washer provided with a eircular V-shapcd rib adjacent to the concave edgeof that one of the sides of the washer i which is intc'ded t'or impact against the face ot the nnt.

The combination, as heroin set forth, of a bolt and nut of ordinary*construetion with a conoidal or dished washer provided upon that one of its sides which hears against the nut with a circular V-shaped rib, all parts of the apex of which after it has acquired contact with the nut are made by the screwing home ot' the nut to simultaneously embed themselves in the face of the nut, and to thereby cftect the progressive movement of a portion of the nut toward the bolt while the central portion of the washer is being forced toward and against the surface of the object upon which the outer portion of the washer bcars.

DAVID DODI).

lVi tnesscs:

JOHN W. KNAUSE, WILLIAM HAYNER. 

